Hello and welcome to justanswer.com my name is XXXXX XXXXX X'm here to help you with your TV problem.
How old is the TV please?
Is the sound ok?
Here is the service manual for your TV and the download will be available for 7 days
When you press the "Menu" button does it appear?
The white screen you're seeing is the backlight shining through.
I've had a couple of these where a MOSFET on the mainboard died which provides 3.3volts to the panel.
Check voltages around the board referring to the service manual. If you're not confident doing surface mounted component repairs then you can order a replacement board from here
Please look at pgs23 & 40 of the manual
Also look for any electrolytic capacitors which have bulged on the top like this. They should be flat across.
Attachments are only available to registered users.
It's the digital pc board in the middle with all the connections and this part is on the underside. Not easy to see
Hope this helps you and is from pg26
I gave you the link above for the mainboard.
There are a couple available for your model depending on the date of manufacture so please get the number off the board in your TV when you open the back of the TV so that you get the correct mainboard from here:
Yes it has the HDMI, VGA on it. Well done on locating it in your TV.